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Development of an external cavity quantum cascade laser spectrometer at 7.5 μm for gas detection


We report the development of an external cavity quantum cascade laser spectrometer at 7.5 μm. The quantum cascade laser and its anti-reflection coating were specially developed for this application. We provide details of the external cavity design and data processing. A continuous wave emission is demonstrated from 1,293 up to 1,350 cm−1. A preliminary test of the spectrometer was realized by measurements on acetone and phosphoryl chloride.

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This work was funded by the French Direction Générale de l’Armement (DGA) (REI «Sélectif» #2009.34.0040), the European program EURIPIDES/EUREKA «Acoustic Nose» #EUR-09-710 and the Champagne-Ardenne region. Dominique Mammez also acknowledges DGA and Champagne-Ardenne region for her Ph.D. funding. The authors are grateful to Arnaud Haudrechy for having provided the POCl3 sample.

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Correspondence to V. Zéninari.

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Mammez, D., Vallon, R., Parvitte, B. et al. Development of an external cavity quantum cascade laser spectrometer at 7.5 μm for gas detection. Appl. Phys. B 116, 951–958 (2014).

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  • Tuning Range
  • Quantum Cascade Laser
  • External Cavity
  • Gain Curve
  • Difference Frequency Generation